User blog comment:LegionZero/Nero's Parallels to Vergil and Sparda/@comment-72.218.90.59-20140901060831/@comment-6769189-20140901080548

1) It's an assumption that Vergil ever had a lover or child. It's impossible for Nero to be that child anyways. Now think, would it be very wise to let demons run rampant in the world if his child was there? It doesn't make sense. Either way any story with Vergil having a lover and child can't really be used to make an argument because no such thing has actually taken place, nor has it implied.

2) he wanted the power of Sparda because he was the strongest guy in history.

3) Judging by his reaction to seeing Mundus at the end of DMC3 chances are he didn't know Mundus was responsible for killing his mom.